import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
import WelCome from '../components/Welcome'
import User from '../components/user/user'
import Rights from '../components/power/Rights'
import Roles from '../components/power/Roles'

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: WelCome },
      { path: '/users', component: User },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles }

    ]
  }
]

const router = new VueRouter({
  routes
})

//  挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数 。表示放行。
  if (to.path === '/login') return next()
  const token = window.sessionStorage.getItem('token')
  if (!token) return next('/login')
  next()
})

export default router
